77953262809 has 12 divisors (see below), whose sum is σ = 79252318080. Its totient is φ = 76674873800.

The previous prime is 77953262767. The next prime is 77953262819. The reversal of 77953262809 is 90826235977.

It is not a de Polignac number, because 77953262809 - 2⁹ = 77953262297 is a prime.

It is a super-2 number, since 2×77953262809² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77953262819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2154732 + ... + 2190610.

It is an arithmetic number, because the mean of its divisors is an integer number (6604359840).

Almost surely, 2^77953262809 is an apocalyptic number.

It is an amenable number.

77953262809 is a deficient number, since it is larger than the sum of its proper divisors (1299055271).

77953262809 is an equidigital number, since it uses as much as digits as its factorization.

77953262809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36452 (or 36381 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 58.

The spelling of 77953262809 in words is "seventy-seven billion, nine hundred fifty-three million, two hundred sixty-two thousand, eight hundred nine".